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ASF GitHub Bot commented on HDFS-17444: --------------------------------------- xiaojunxiang2023 commented on PR #6694: URL: https://github.com/apache/hadoop/pull/6694#issuecomment-2029037464 @hiwangzhihui, Hi~, please help me review it. > Add getJournalSyncerStatus jmx metrics, to Indicates whether the > JournalSyncer thread for the every namespace has enter working state. > -------------------------------------------------------------------------------------------------------------------------------------- > > Key: HDFS-17444 > URL: https://issues.apache.org/jira/browse/HDFS-17444 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs > Affects Versions: 3.3.4, 3.3.6 > Reporter: xiaojunxiang > Assignee: xiaojunxiang > Priority: Major > Labels: pull-request-available > Attachments: image-2024-03-31-09-31-18-056.png > > > The JornalNode JVM process is not immediately in a normal state until the > JournalSyncer thread is started. > For some management platforms such as Ambari rolling restart JournalNode, we > need a jmx metric to determine whether the JournalSyncer thread is started > and enter working state for current namespace before restarting the next > JournalNode. Otherwise, restart too quickly and more than half of > JournalNodes will be out of order, causing the NameNode to die. > When i add it , the effect is as follows: > !image-2024-03-31-09-31-18-056.png! -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org